Combined gas turbine-steam cycle waste-to-energy plant
AssigneeMontenay International Corp.
InventorsWolfram G. Schuetzenduebel, Daniel M. Smith
Life of this patent
Estimating the term…
Abstract
A waste-to-energy plant which is designed and operated to burn municipal waste combines a high pressure steam turbine/generator cycle and a combustion turbine/generator cycle; wherein the exit gas from the combustion turbine is utilized to superheat high pressure steam prior to entering the steam turbine. The combination of the combustion turbine/generator cycle with the steam turbine/generator cycle enables operation of the waste-to-energy plant at high pressure and high temperature resulting in greatly increased thermal cycle efficiency while eliminating superheater surfaces from the waste heat recovery boiler, thereby greatly reducing corrosion problems associated with waste heat recovery boilers.
Claims10
A waste treatment facility which operates efficiently and reduces boiler plant corrosion comprising:
- a) a high pressure waste heat recovery boiler having a recovery boiler steam outlet, said waste heat recovery boiler being designed and configured to burn municipal, commercial, or industrial waste to generate saturated steam at a pressure of at least 1000 psia from feed water;
- b) a high pressure steam superheater, having at least a first side and a second side, said first side having a steam inlet in fluid communication with the recovery boiler steam outlet, said steam superheater being designed and configured to superheat steam having a pressure of at least 1000 psia;
- c) the first side of said steam superheater having a superheated steam outlet for the exit of superheated steam having a pressure of at least 1000 psia;
- d) a combustion turbine having a combustion gas outlet, said combustion turbine being designed and configured to burn fuel to power the combustion turbine, and wherein the combustion gas outlet is in fluid communication exclusively with the second side of the steam superheater and the combustion gas provides heat to superheat steam flowing through the first side of said steam superheater;
- e) a steam turbine designed and configured to operate by means of superheated steam having a pressure of at least 1000 psia, said steam turbine having an inlet in fluid communication with said superheated steam outlet of said steam superheater;
- and
- f) said steam superheater having a combustion gas outlet in exclusive fluid communication with a combustion turbine exhaust gas heat recovery unit.
A waste treatment facility which operates efficiently and reduces boiler plant corrosion comprising:
- a) a high pressure waste heat recovery boiler having a recovery boiler steam outlet, said waste heat recovery boiler being designed and configured to burn municipal, commercial, or industrial waste to generate saturated steam at a pressure of at least 1000 psia from feed water;
- b) a high pressure steam superheater, having at least a first side and a second side, said first side having a steam inlet in fluid communication with the recovery boiler steam outlet, said steam superheater being designed and configured to superheat steam having a pressure of at least 1000 psia;
- c) the first side of said steam superheater having a superheated steam outlet for the exit of superheated steam having a pressure of at least 1000 psia;
- d) a combustion turbine having a combustion gas outlet, said combustion turbine being designed and configured to burn fuel to power the combustion turbine, and wherein the combustion gas outlet is in fluid communication exclusively with the second side of the steam superheater and the combustion gas provides heat to superheat steam flowing through the first side of said steam superheater;
- e) a steam turbine designed and configured to operate by means of superheated steam having a pressure of at least 1000 psia, said steam turbine having an inlet in fluid communication with said superheated steam outlet of said steam superheater;
- f) said steam superheater having a combustion gas outlet in exclusive fluid communication with a combustion turbine exhaust gas heat recovery unit;
- g) a first electrical generator in communication with and powered by said steam turbine;
- and
- h) a second electrical generator in communication with and powered by said combustion turbine.
Dependencies are inferred from the claim text.